Process and apparatus for securing reenforcing collars to paper containers



June 22, 1937. PERKINS 2,084,451

PROCESS AND APPARATUS FOR SECURING REENFORCING A COLLARS TO PAPER CONTAINERS Filed Jan. 23, 1956 3nventor Hengz 6 Rr/ ins 4 ttorneg 15 a cover.

Patented June 22, 1937 PROCESS AND APPARATUS FOR SECURING EEENFORCING COLLARSLTO PAPER CON- TAINEBS Henry George Perkins, Baltimore, 'Md., assignor to Purity Paper Vessels Company, Baltimore, Md, a corporation of Maryland Application January 23, 1936, Serial No. 60,503

3 Claims.

be placed upon and firmly secured to a cylindrical portion of a paper vessel.

Paper containers of inverted frustro-conical shape, that is, with bottom diameter less than top diameter, are found desirable for many purposes, particularly for use by retail dealers for holding small quantities of liquid or semiliquid commodities, but if the tapered form is carried to the upper edge the container lacks resistance to compression and is not well adapted to receive It has been proposed to apply to this upper end portion of the tapered container a reenforcing ring cylindrical on its outer surface and tapered on its inner surface to fit the taper of the body of the container, but this proposed construction is open to serious objections on account of expense, as well as for other reasons.

In my application for patent, filed September 1, 1935, Serial No. 40,146, I have presented a container of the frustro-conical shape up to a short distance from its upper edge and cylindrical from the end of the tapered portion to the upper edge, and having a cylindrical collar applied to the outside of this cylindrical portion. My present invention relates particularly to a process and apparatus by which the cylindrical collar of my application referred to may be applied to the cylindrical upper portion of the body so as to be satisfactorily secured in position.

With this object in view my invention consists 5 in the steps of process and the construction and combination of the elements of the apparatus hereinafter described and claimed.

Referring to the drawings:

Figure 1 is a central vertical sectional View of apparatus embodying my invention and adapted ready to receive the reenforcing ring, and

Figure 4 is a vertical, sectional view showing the container body and reenforcing ring in final position.

In the drawings, I indicates the frustro-conical body of a paper container having at its upper end a cylindrical portion 2 adapted to receive a cylindrical collar 3. The inner surface of this cylindrical collar must of course fit snugly against the outer surface of the'cylindrical portion 2 to which it is secured by glue or other adhesive which has to be applied to one or the other, or both, of these surfaces. If the cylindrical portion 2'is in cylindrical shape and the reenforcing collar is forced downward, or upward, into final position, the film of adhesive which should be evenly distributed between contacting surfaces will be like 1y to be more or less scraped away with the re sult of disturbing its even distribution, or even forcing some of it below the lower edge of the collar. To avoid any such result I cause the upper edge of cylindrical portion 2 ,to be crimped inward into a somewhat conical form so that it may he slipped into collar 3 and afterwards expanded into cylindrical form.

Apparatus suitable for crimping the upper edge of cylindrical portion? is shown in Figure I l and Figure 2, and comprises an upper member iand a lower hollow member 5, the lower memher being adapted to receive the tapered portion l of a container with the cylindrical portion 2 extending above its upper end. Upper member 4 is a hollow cylinder vertically slidable within a cylinder 6 and held normally in elevated position by springs I carried on pins 8 extending upward from flange 9 on fixed cylinder 6 through openings in flange ill on member 4. Outside the lower end of fixed cylinder 6 andextending downward therefrom is a ring ll having inwardly extending flange I l at its lower end. Above flange H at suitable intervals Within ring ll arepairs of lugs 12 to carry the pivots of upwardly extend ing arms l3 having their upper ends rounded as shown.

In carrying out my process the container body with its cylindrical upper portion is first formed in any usual manner'as by binding a strip of paper of suitable thickness about a form and securing the edges together as described in my application for patent above referred to and the body so formed is inserted in lower member 5 -with its cylindrical portion extending above its edge. Lower member 5 is then brought into register with upper member 4 and is forced upward within depending ring ll. cal portion 2 into contact with arms l3 and because of the inward inclination of these arms the cylindrical portion 2 is bent inward at intervals to form crimps I4 so that portion 2 is caused to assume a somewhat frustro-conical shape. Fur-. ther crimping action is effected by downward movement of upper member 4 acting against the rounded upper ends of arms l3.

The container body with its upper portion crimped as just described is then withdrawn and, reenforcing ring 3 having been previously coated This brings cylindri-v on its inner surface with suitable adhesive is put over the crimped upper portion 2 to rest against the upper edge of lower member 5 with ring l5 also resting on the upper edge of member 5 and extending about the reenforcingring. The portion 2 is then expanded by any suitable means into its cylindrical form with its outer surface against the film of adhesive on the inner surfac of the reenforcing ring.

Having thus described my invention, what I claim is:

1. The herein described process of securinga cylindrical ring to the outside of a cylindrical 1 portion at one end of a paper container which consists in applying adhesive to the inner sur'-' face of the ring,.reducing the diameterof the cylindrical end portion of the container, insert ing said end portion so reduced into the ring and subsequently expanding said cylindrical endportion of the container body to bring its outer surface into contact with the adhesive-on the inner surface of the ring.

2. In apparatus for securing a cylindricalring to a cylindrical end portion of a paper container, means for reducing the diameter of the end of said cylindrical portion comprising a holder for the bodyof the container, an outer cylinder carry-' ing at its lower end a ring adapted to rest upon the holder having a plurality of swinging arms extending upward and inward from the lower end of said ring, and a cylindrical member within said outer cylinder for applying pressure to they upper ends of said arms to cause them to swin inward on their pivots against the cylindrical i vend portion of the container to. crimp it inward.

3. In apparatus for securing a cylindrical ring to a cylindrical end portion of a paper container, means for reducing the diameter of the end of said cylindrical portion comprising a holder for to swing inward on their pivots against the cylin- V the body of the container, an outer cylinder drical end portionof the container to crimp it j inward and means for holdingsaid' ininermember normallyin raised position.

HENRY GEORGE I PERKINS. 

